CN214469098U - Sterilization purification air exchange system - Google Patents
Sterilization purification air exchange system Download PDFInfo
- Publication number
- CN214469098U CN214469098U CN202120456243.1U CN202120456243U CN214469098U CN 214469098 U CN214469098 U CN 214469098U CN 202120456243 U CN202120456243 U CN 202120456243U CN 214469098 U CN214469098 U CN 214469098U
- Authority
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- Prior art keywords
- fresh air
- unit
- sterilization
- fan
- air
- Prior art date
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- 230000001954 sterilising Effects 0.000 title claims abstract description 58
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 54
- 238000000746 purification Methods 0.000 title claims abstract description 25
- 238000001914 filtration Methods 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000009423 ventilation Methods 0.000 claims description 14
- 150000002500 ions Chemical class 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 abstract description 7
- 230000000249 desinfective Effects 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 description 6
- 241000700605 Viruses Species 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006011 modification reaction Methods 0.000 description 3
- 206010022000 Influenza Diseases 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
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- RECVMTHOQWMYFX-UHFFFAOYSA-N oxygen(1+) dihydride Chemical compound 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- 231100000719 pollutant Toxicity 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Abstract
The sterilization purification air exchange system comprises a shell, a fresh air flowing unit, a return air discharging unit, a heat exchange unit and a sterilization unit. The fresh air flowing unit provides a fresh air flowing channel and comprises a first fan arranged in the fresh air flowing channel, a fresh air suction port and a fresh air discharge port which are arranged at two ends of the fresh air flowing channel; the return air discharge unit is provided with a return air circulation channel and comprises a second fan arranged in the return air circulation channel, and a return air suction inlet and a return air discharge outlet which are arranged at two ends of the return air circulation channel; the heat exchange unit is positioned at the intersection of the fresh air circulation channel and the return air circulation channel; the unit setting of disinfecting is in new trend circulation channel, purifies through the aforesaid and trades the circulation that the wind system can realize the room air and effectively disinfect to provide the clean new trend that is fit for space environment temperature.
Description
Technical Field
The utility model relates to an air circulation clean system.
Background
In modern society, people have higher and higher requirements on indoor air environment, and indoor air is gathered for a long time, so that great influence is brought to the health of people. If the direct window-opening ventilation mode is adopted, the temperature difference between indoor air and outdoor air is large, so that the indoor temperature is suddenly reduced, the resistance of a body is reduced, impurities in the outside air can enter, such as pollen and dust allergens, and the like, can possibly have great influence on the artificial allergic physique, particularly in the season of frequent flu in spring and winter, viruses, bacteria and the like in the air cannot enter the room for a long time and are not circulated, the flu is easily spread, and the hidden health trouble is brought to people living indoors.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a disinfect and purify system of airing exhaust to realize the effective circulation of room air, and provide the clean new trend that is fit for space ambient temperature.
The sterilization, purification and air exchange system for achieving the purpose comprises a shell, a fresh air flowing unit, a return air discharging unit, a heat exchange unit and a sterilization unit. The fresh air flowing unit provides a fresh air flowing channel and comprises a first fan arranged in the fresh air flowing channel, a fresh air suction port and a fresh air discharge port which are arranged at two ends of the fresh air flowing channel; the return air discharge unit is provided with a return air circulation channel and comprises a second fan arranged in the return air circulation channel, and a return air suction inlet and a return air discharge outlet which are arranged at two ends of the return air circulation channel; the heat exchange unit is positioned at the intersection of the fresh air circulation channel and the return air circulation channel; the sterilization purification air exchange system further comprises a sterilization unit, and the sterilization unit is arranged in the fresh air circulation channel.
In one embodiment, the sterilization unit comprises a discharge device and a cooling device, the cooling device condenses part of fresh air on the fresh air circulation channel to form water, and the discharge device ionizes the water on the cooling device to generate nano water ions.
In one embodiment, the sterilization unit is located between the heat exchange unit and the first fan.
In one embodiment, the sterilization unit is located between the fresh air intake and the heat exchange unit.
In one embodiment, the fresh air flow unit further comprises a filter device located between the fresh air intake and the first fan.
In one embodiment, the filter device comprises a first filter device located between the fresh air intake and the heat exchange unit and a second filter device located between the heat exchange unit and the first fan.
In one embodiment, the filter device comprises a first filter device located between the fresh air intake and the heat exchange unit and a second filter device located between the first filter device and the heat exchange unit.
In one embodiment, the sterilization unit is located between the second filter device and the first fan.
In one embodiment, the sterilization unit is fixed inside the housing.
In one embodiment, the first fan and the second fan are both centrifugal fans.
Above-mentioned disinfect and purify system of changing wind can realize the effective circulation of indoor air and external new trend, provides the new trend that is fit for indoor temperature to effectively detach bacterium and virus in the external new trend through the unit of disinfecting, continuously for the indoor new trend that provides safety, clean, circulation, thereby improve the quality of indoor air environment.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the constituent units of the sterilization, purification and ventilation system.
Fig. 2 is a schematic view of the internal structure of the sterilization, purification and ventilation system.
Description of the reference numerals
4 casing
10 return air discharge unit
11 return air suction inlet
12 return air outlet
13 second fan
14 return air circulation channel
20 fresh air flow unit
21 fresh air suction inlet
22 fresh air exhaust port
23 first fan
24 fresh air circulation channel
26 Filter device
30 heat exchange unit
40 Sterilization Unit
41 Power supply part
Detailed Description
The present invention will be further described with reference to the following embodiments and drawings, and more details will be set forth in the following description in order to provide a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in various other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions according to the actual application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the embodiments.
It should be noted that these and other figures are given by way of example only and are not drawn to scale, and should not be construed as limiting the scope of the invention as it is actually claimed.
The sterilization, purification and ventilation system shown in fig. 1 and 2 comprises a housing 4, a fresh air flowing unit 20, a return air discharging unit 10, a heat exchanging unit 30 and a sterilization unit 40, wherein the fresh air flowing unit 20 provides a fresh air circulating channel 24, and the return air discharging unit 10 provides a return air circulating channel 14. The fresh air flowing unit 20 includes a first fan 23 disposed in a fresh air flowing channel 24, and a fresh air suction inlet 21 and a fresh air discharge outlet 22 disposed at two ends of the fresh air flowing channel 24, and the return air discharge unit 10 includes a second fan 13 disposed in a return air flowing channel 14, and a return air suction inlet 11 and a return air discharge outlet 12 disposed at two ends of the return air flowing channel 14. Indoor air enters the sterilization purification air exchange system through the return air suction inlet 11 and then is discharged out of the return air outlet 12 through the second fan 13; outdoor fresh air enters the sterilization purification air exchange system through a fresh air inlet 21 and is discharged out of a fresh air outlet 22 through a first fan 23.
The first fan 23 and the second fan 13 are preferably centrifugal fans, a radial outlet of the first fan 23 is communicated with a fresh air outlet 22 of the fresh air flowing unit 20, a radial outlet of the second fan 13 is communicated with a return air outlet 12 of the return air outlet unit 10, outdoor fresh air or indoor air enters the blades from the axial direction of the centrifugal fan, flows out through the radial outlet of the centrifugal fan, and is finally discharged to an indoor space through the fresh air outlet 22 or is discharged to the outdoor through the return air outlet 12. The centrifugal fan has excellent air supply and air exhaust effects, no excessive mechanical friction exists during operation, the operation is stable, and the noise can be reduced by a proper molded line. The interior of the fan is preferably made of sound-absorbing materials so as to reduce the noise generated when the sterilization, purification and air exchange system works and keep the indoor quiet.
The heat exchange unit 30 is located at the intersection of the fresh air circulation channel 24 and the return air circulation channel 14, and is used for exchanging heat between outdoor fresh air and indoor air, transferring heat of the indoor air to the outdoor fresh air, maintaining the temperature of the air in a room at a proper temperature, and avoiding the phenomenon of supercooling or overheating of the air due to a large temperature difference between indoor and outdoor environments, and influencing human health. The heat exchange unit 30 includes but is not limited to a shell and tube heat exchanger, a jacketed heat exchanger, a plate heat exchanger, etc., and is not limited to a copper tube heat exchanger, a steel-aluminum composite finned tube heat exchanger, etc. in terms of material, as long as effective heat exchange between air is effectively realized.
The sterilization purification air exchange system further comprises a sterilization unit 40, wherein the sterilization unit 40 is arranged in the fresh air circulation channel 24 and is used for sterilizing fresh air in the fresh air circulation channel 24. The sterilizing unit 40 is preferably a nano water ion sterilizing device including a discharging device (not shown in the drawing) and a cooling device (not shown in the drawing). The cooling device condenses part of the fresh air on the fresh air circulation channel 24 out of water, and the discharge device ionizes the water on the cooling device to generate nano water ions. The nanometer water ions are composed of water particles and comprise hydroxide radical carrying negative ions, the negative ions of the hydroxide radical are contacted with bacteria or viruses, and the molecular protein structure of the bacteria or the viruses is destroyed through self negative electrons, so that the bacteria or the viruses die. The nano water ions are continuously present for several times in the air more than common negative ions, so the nano water ions are released to the indoor space through the first fan 23 in the fresh air flowing unit 20, the covering distance can reach several meters with the help of the air exchanging system, the nano water ions can be permanently spread to all corners of a room, bacteria or viruses in the indoor air can be effectively killed, and a safe indoor environment is created.
The discharge device includes, but is not limited to, a discharge needle or the like, and the condensed water droplets on the device are cooled down electrolytically by applying a voltage to the discharge needle. In the embodiment shown in fig. 2, the discharge device is provided with an additional separate power supply unit 41 for supplying a voltage of a suitable magnitude to the discharge device. In other embodiments, the power supply part 41 does not need to be separately provided, for example, the power supply part 41 can not be separately provided when the operating voltages of the discharging device and the sterilization, purification and ventilation system are 220V; if the sterilization, purification and air exchange system is provided with a power supply main board, the working voltage of the discharge equipment can be directly adjusted and supplied through the power supply main board.
In the embodiment shown in fig. 1 and 2, the sterilizing unit 40 is positioned between the heat exchanging unit 30 and the first fan 23, and is fixed inside the housing 4. Fresh air enters the fresh air circulation channel 24 from the fresh air inlet 21, is adjusted in temperature by the heat exchange unit 30, and then flows through the sterilization unit 40. Part of the fresh air is cooled to discharge water under the action of the cooling equipment, and the discharging equipment electrolyzes and condenses the obtained water to obtain nano water ions. The part of nanometer ion and new trend direct contact promptly disinfects it, and another part flows through first fan 23 along with new trend, discharges in the interior space by new trend discharge port 22 afterwards, reaches each corner of room and disinfects. Compared with the traditional ultraviolet irradiation sterilization mode, the nano water ions have longer sterilization duration and better sterilization effect.
In another embodiment, the sterilization unit 40 is located between the fresh air intake port 21 and the heat exchange unit 30. That is, the fresh air enters the fresh air circulation channel 24 from the fresh air inlet 21 and then directly flows through the sterilization unit 40, so as to realize sterilization of the fresh air. For the description of the operation principle of the sterilization unit 40, reference may be made to the foregoing embodiments, and the description of the embodiments is not repeated.
Referring to fig. 2, the fresh air flowing unit 20 further includes a filtering device 26, and the filtering device 26 is located between the fresh air suction port 21 and the first fan 23, and is used for filtering and purifying impurities such as dust or pollutant particles in the fresh air. The filtering device 26 includes a first filtering device and a second filtering device, the first filtering device is located between the fresh air suction port 21 and the heat exchange unit 30 and is used for primarily filtering large-sized impurities in the fresh air; the second filtering device is located between the heat exchange unit 30 and the first fan 23, and is used for enhancing the filtering and purifying effect and continuously filtering small-size impurities in the fresh air. For example, the first filter equipment can select activated carbon material, non-woven fabric material etc. and the second filter equipment can select glass fiber filter paper, HEPA filter paper etc. to realize the multilayer purification of new trend, guarantee to get into indoor air clean. The first and second filtering devices include, but are not limited to, the above materials, and the material selection of the first and second filtering devices and the installation of the filtering devices may be adjusted according to the actual purification environment, for example, the first filtering device is located between the fresh air suction port 21 and the heat exchange unit 30, and the second filtering device is located between the first filtering device and the heat exchange unit 30. The filtering device 26 is not limited to two-layer filtering, and the number of filtering layers can be increased or decreased according to different requirements of indoor environment.
On the basis of the above embodiment, the sterilization unit 40 is located between the second filtering device and the first fan 23, and the fresh air passes through the sterilization unit 40 after being subjected to the multi-layer filtering and purifying of the filtering device 26, so that the fresh air is purified and sterilized at the same time, and the clean fresh air is ensured.
Although the present invention has been described in connection with the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention, such as the specifications of the first fan and the second fan, the number and arrangement of the sterilization units, the cross arrangement of the fresh air circulation channel and the return air circulation channel, etc. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (10)
1. Disinfect and purify system of changing wind includes:
a housing (4);
the fresh air flowing unit (20) provides a fresh air flowing channel (24) and comprises a first fan (23) arranged in the fresh air flowing channel (24), a fresh air suction port (21) and a fresh air discharge port (22) which are arranged at two ends of the fresh air flowing channel (24);
the return air discharge unit (10) is used for providing a return air circulation channel (14) and comprises a second fan (13) arranged in the return air circulation channel (14), and a return air suction inlet (11) and a return air discharge outlet (12) which are arranged at two ends of the return air circulation channel (14);
a heat exchange unit (30) located at the intersection of the fresh air circulation channel (24) and the return air circulation channel (14);
the sterilization, purification and air exchange system is characterized by further comprising a sterilization unit (40), wherein the sterilization unit (40) is arranged in the fresh air circulation channel (24).
2. The sterilization, purification and ventilation system according to claim 1, wherein said sterilization unit (40) comprises a discharge device and a cooling device, said cooling device condenses part of the fresh air on said fresh air circulation channel (24) out of water, said discharge device ionizes the water on said cooling device to produce nano water ions.
3. The sterilization, purification and ventilation system according to claim 1 or 2, wherein said sterilization unit (40) is located between said heat exchange unit (30) and said first fan (23).
4. The sterilization, purification and ventilation system according to claim 1 or 2, wherein said sterilization unit (40) is located between said fresh air intake (21) and said heat exchange unit (30).
5. The sterilization, purification and ventilation system according to claim 1, wherein said fresh air flowing unit (20) further comprises a filtering device (26), said filtering device (26) being located between said fresh air suction opening (21) and said first fan (23).
6. The sterilization, purification and ventilation system according to claim 5, wherein said filtering device (26) comprises a first filtering device located between said fresh air suction opening (21) and said heat exchange unit (30) and a second filtering device located between said heat exchange unit (30) and said first fan (23).
7. The sterilization, purification and ventilation system according to claim 5, wherein said filtering device (26) comprises a first filtering device located between said fresh air suction opening (21) and said heat exchange unit (30) and a second filtering device located between said first filtering device and said heat exchange unit (30).
8. Sterilization-cleansing-ventilation system according to claim 6 or 7, characterized in that said sterilization unit (40) is located between a second filtering device and said first fan (23).
9. The sterilization, purification and ventilation system according to claim 1, characterized in that said sterilization unit (40) is fixed inside said casing (4).
10. The sterilization, purification and ventilation system according to claim 1, wherein said first fan (23) and said second fan (13) are both centrifugal fans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120456243.1U CN214469098U (en) | 2021-03-02 | 2021-03-02 | Sterilization purification air exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120456243.1U CN214469098U (en) | 2021-03-02 | 2021-03-02 | Sterilization purification air exchange system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214469098U true CN214469098U (en) | 2021-10-22 |
Family
ID=78152223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120456243.1U Active CN214469098U (en) | 2021-03-02 | 2021-03-02 | Sterilization purification air exchange system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214469098U (en) |
-
2021
- 2021-03-02 CN CN202120456243.1U patent/CN214469098U/en active Active
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